Brown fat conversion

Interesting articles on the difficulties of weight loss, an effect of exercise, and how diet is necessary to lose weight, with consistent exercise required to keep it off.

http://www.nytimes.com/2012/01/01/magazine/tara-parker-pope-fat-trap.htm...

http://well.blogs.nytimes.com/2012/01/11/exercise-hormone-helps-keep-us-...